Charging policy information for a home session management function
A home session management function (SMF) of a home public land mobile network (PLMN) receives, from a visited SMF of a visited PLMN from a visited SMF of a visited PLMN, a request for creation of a packet data unit (PDU) session of a wireless device. The request comprises first charging policy information determined based on a first policy of the visited PLMN. The home SMF sends, to the visited SMF and based on the request, a second charging policy information comprising: a charging method for the PDU session; and a charging parameter indicating a charging level for the PDU session.
1. A method comprising:
receiving, by a home session management function (SMF) of a home public land mobile network (PLMN) from a visited SMF of a visited PLMN, a request for creation of a packet data unit (PDU) session of a wireless device, the request comprising first charging policy information corresponding to a first policy of the visited PLMN;
sending, by the home SMF to a home policy control function (PCF), a charging policy request message comprising the first charging policy information;
receiving, by the home SMF from the home PCF, a charging policy response message comprising second charging policy information determined based on the first charging policy information; and
sending, by the home SMF to the visited SMF, the second charging policy information, wherein the second charging policy information comprises:
a charging method for the PDU session; and
a charging parameter indicating a charging level for the PDU session.
2. The method of claim 1 , wherein the second charging policy information further comprises a charging rate.
3. The method of claim 1 , further comprising:
sending, by the home SMF to a home charging function (CHF), a charging data request (CDR) message requesting establishment of a charging session for the PDU session, the CDR message comprising the first charging policy information;
receiving, by the home SMF from the home CHF, a charging data response message comprising a fourth charging policy information, wherein the fourth charging policy information is determined by the home CHF based on the first charging policy information; and
determining, by the home SMF, the second charging policy information based on the fourth charging policy information.
4. The method of claim 1 , wherein the charging policy request message further comprises a charging control rule indicating at least one of:
a charging policy;
a quality of service policy; or
a gating policy.
5. The method of claim 1 , wherein the first charging policy information comprises at least one of:
a first charging method;
a first charging level; or
a first charging rate.
6. The method of claim 1 , wherein the charging method comprises at least one of:
an information element indicating that an online charging for the PDU session;
an information element indicating that an offline charging for the PDU session; or
an information element indicating that a converged charging for the PDU session.
7. The method of claim 1 , wherein the charging level comprises at least one of:
an information element indicating a PDU session charging;
an information element indicating a flow based charging;
an information element indicating a QoS flow based charging;
an information element indicating a service level charging; or
an information element indicating a subsystem level charging.
8. The method of claim 1 , further comprising:
sending, by the home SMF to a home user plane function (UPF), a N4 request message requesting to establish or modify a N4 session, the N4 request message comprising at least one charging control rule for the PDU session; and
receiving, by the home SMF from the home UPF, a N4 response message in response to the N4 request message.
9. The method of claim 1 , wherein the request comprises at least one of:
an identifier of the wireless device; or
an identifier of the PDU session.
10. An apparatus comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause a home session management function (SMF) of a home public land mobile network (PLMN) to:
receive, from a visited SMF of a visited PLMN from a visited SMF of a visited PLMN, a request for creation of a packet data unit (PDU) session of a wireless device, the request comprising first charging policy information corresponding to a first policy of the visited PLMN; and
send, to a home policy control function (PCF), a charging policy request message comprising the first charging policy information;
receive, from the home PCF, a charging policy response message comprising second charging policy information determined based on the first charging policy information; and
send, to the visited SMF, the second charging policy information, wherein the second charging policy information comprises:
a charging method for the PDU session; and
a charging parameter indicating a charging level for the PDU session.
11. The apparatus of claim 10 , wherein the second charging policy information further comprises a charging rate.
12. The apparatus of claim 10 , wherein the instructions, when executed by the one or more processors, further cause the home SMF to:
send, to a home charging function (CHF), a charging data request (CDR) message requesting establishment of a charging session for the PDU session, the CDR message comprising the first charging policy information;
receive, from the home CHF, a charging data response message comprising a fourth charging policy information, wherein the fourth charging policy information is determined by the home CHF based on the first charging policy information; and
determine the second charging policy information based on the fourth charging policy information.
13. The apparatus of claim 10 , wherein the charging policy request message further comprises a charging control rule indicating at least one of:
a charging policy;
a quality of service policy; or
a gating policy.
14. The apparatus of claim 10 , wherein the first charging policy information comprises at least one of:
a first charging method;
a first charging level; or
a first charging rate.
15. The apparatus of claim 10 , wherein the charging method comprises at least one of:
an information element indicating that an online charging for the PDU session;
an information element indicating that an offline charging for the PDU session; or
an information element indicating that a converged charging for the PDU session.
16. The apparatus of claim 10 , wherein the charging level comprises at least one of:
an information element indicating a PDU session charging;
an information element indicating a flow based charging;
an information element indicating a QoS flow based charging;
an information element indicating a service level charging; or
an information element indicating a subsystem level charging.
17. The apparatus of claim 10 , wherein the instructions, when executed by the one or more processors, further cause the home SMF to:
send, to a home user plane function (UPF), a N4 request message requesting to establish or modify a N4 session, the N4 request message comprising at least one charging control rule for the PDU session; and
receive, from the home UPF, a N4 response message in response to the N4 request message.
18. A system comprising:
a visited session management function (SMF) of a visited public land mobile network (PLMN); and
a home SMF of a home PLMN comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the home SMF to:
receive, from a visited SMF of a visited PLMN from a visited SMF of a visited PLMN, a request for creation of a packet data unit (PDU) session of a wireless device, the request comprising first charging policy information corresponding to a first policy of the visited PLMN; and
send, to a home policy control function (PCF), a charging policy request message comprising the first charging policy information;
receive, from the home PCF, a charging policy response message comprising second charging policy information determined based on the first charging policy information; and
send, to the visited SMF, the second charging policy information, wherein the second charging policy information comprises:
a charging method for the PDU session; and
a charging parameter indicating a charging level for the PDU session.